jdk/test/javax/imageio/plugins/gif/StreamMetadataTest.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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 * questions.
 */

/*
 * @test
 * @bug 6319418
 * @summary Test verifies that GIF stream metadata could be merged with tree
 *          representation for all supported formats
 */

import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.metadata.IIOInvalidTreeException;
import javax.imageio.metadata.IIOMetadata;

import org.w3c.dom.Node;

public class StreamMetadataTest {
    protected static final String format = "GIF";

    ImageWriter writer = null;
    IIOMetadata streamData = null;
    ImageWriteParam wparam = null;
    boolean doMerge = true;

    public StreamMetadataTest() {
        writer = ImageIO.getImageWritersByFormatName(format).next();
        wparam = writer.getDefaultWriteParam();
        streamData = writer.getDefaultStreamMetadata(wparam);
    }

    public void doTest() throws IIOInvalidTreeException {
        if (streamData == null) {
            throw new RuntimeException("No stream metadata available");
        }

        String[] formatNames = streamData.getMetadataFormatNames();
        for(String fname : formatNames) {
            System.out.println("Format name: " + fname);
            Node root = streamData.getAsTree(fname);
            if (streamData.isReadOnly()) {
                throw new RuntimeException("Stream metadata is readonly!");
            }
            streamData.reset();
            streamData.mergeTree(fname, root);
        }
    }

    public static void main(String args[]) {
        StreamMetadataTest test = new StreamMetadataTest();
        try {
            test.doTest();
        } catch (Exception e) {
            throw new RuntimeException("Test failed.", e);
        }
    }
}